Try asking in the "VINs you want FASTed" thread, use a random R32 GTR VIN like "BNR32 003945" and get em to look up the part number for the headlight bracket. I'd look it up for you, but I just reinstalled XP on my machine and have to install FAST again.
Skylines never came with DOT approved headlights. If you want to be cheeky, try getting a DOT approval etched on your headlight (illegal, but meh) back in the day in Australia before the compliance laws got relaxed, the rear quarter windows on some R32's weren't ADR (our version of DOT) approved, so some compliance workshops used to get a fake approval etched onto it, and then put it thru the system just fine.
You'll still get caught out on the road because your headlight will glare into oncoming traffic, but at least your inspection will be OK.
Failing that I've seen people use S14 and Accord headlights on their R32's in Canada hehehe... looks like arse, but if you want one badly and want to stay legal, thems the breaks. Or be a pioneer and put a 240SX front (pop up, not the JDM tyte silvia one) on your skyline